I heard about this on the latest Retro-Computing-Roundtable podcast. It's the GoTek floppy emulator, which can install in a floppy bay of any old classic computer, but allows one to use floppy images on a USB flash memory stick.
Someone has modified the firmware to work with Amiga disk images.
http://cortexamigafloppydrive.wordpress.com/This is a very cheap device (less than $50US) that is widely available on eBay and elsewhere. I know there are other such devices like the Kryoflux, etc., but they seem more expensive. This seems like it could be a big deal for all owners of Amigas without hard drives (or with failing hard drives).
Would also be an easy way for someone who buys his/her first Amiga without a Workbench floppy to get an Workbench image booting.
Did a search in the forum and didn't see this posted anywhere before.